Journal
MATERIALS
Volume 14, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/ma14112964
Keywords
microstructure; dual phases; friction; oxidative wear; adhesive wear
Categories
Funding
- China Scholarship Council [201801810062]
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The study found that the martensite volume fraction has a significant impact on oxidative wear in 25CD4 dual-phase steel. Both friction coefficient and wear rate increase with higher MVF, leading to an increase in oxidation.
It is generally known that microstructure can considerably affect the tribological behavior of non-lubricated rubbing. However, there is still a lack of awareness about the effect of microstructure on oxidative wear. The present study focused on the effect of martensite volume fraction (MVF) on oxidative wear by using 25CD4 dual-phase steel. Dry friction tests were performed on a ball-on-flat tribometer with a normal load of 15 N and a mean sliding velocity of 0.013 m/s. Friction coefficient and wear rate increase with the increasing MVF. SEM observation and EDXS analyses of the wear scars showed that the oxidation increases with decreasing MVF. For lower MVF, the main wear mechanism is mild oxidative wear. For higher MVF, severe adhesion is predominant as a wear mechanism. The size of the debris decreases with decreasing MVF.
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